Metal-working machine.



No. 766,828. I v PATENTED AUG. 9, 1904. M. c. JOHNSON.

METAL WORKING MACHINE.

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No. 766,828. PATENTED AUG. 9, 1904. M. O. JOHNSON. METAL WORKING MACHINE.

APPLICATION FILED MAR. 7. 1903. 7 N0 MODEL. 12 SHEETS-411331 2.

PATENTBD AUG. 9,1190%.

M. G. JOHNSON.

METAL WORKING MACHINE.

APPLIUATION FILED MAR. 7. 1903.

12 SHEETS-SHEET 3.

N0 MODEL.

PATENTED AUG. 9, 1904.

M. 0. JOHNSON. METAL WORKING MACHINE.

APPLICATION FILED MAE. 7, 1903.

N0 MODEL.

3 &\ U Q x M H w o 0 mx ww @R MR Q So km WWJ/MW No. 766.828. 7 PATBNTED AUG. 9, 1904. M. O. JOHNSON.

METAL WORKING MACHINE.

. AIPLIOATION FILED MAB. '7. 1903.

N0 MODEL. 7 12 SHEETS-SHEET 5.

PATENTED AUG. 9, 1904..

M, G. JOHNSON. METAL WORKING MACHINE.

APPLICATION FILED MAR. I, 1903.

12 SHEETS-SHEET 6.

N0 MQDEL.

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PATBNTED AUG. 9, .1904.

M. c. Jonson. METAL WORKING MACHINE.

APPLIUATIOII FILED EAR. '7, 1903.

12 BKBETB-BHBBT 7.

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H0 MODEL.

Witnesses.-

PATBNTED AUG. 9, 1904.

M. C. JOHNSON.

METAL WORKING MACHINE.

APPLICATION FILED MAR. 7. 1903.

N0 MODEL.

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PATENTED AUG. 9, 1904.

M. G. JOHNSON. METAL WORKING MACHINE.

ILED MAE. 7. 1903.

APPLIUATION 1E 12 fiHBHTS-SHEBT 9.

N0 MODEL.

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PATBNTBD AUG. -9, 1904.

' M. O. JOHNSON.

METAL WORKING MACHINE.

APPLICATION FILED MAR. 7, 1903. v

12 SHEETS-SHEET 10.

NO MODEL.

@mm b A/z No. 766,828. PATENTED AUG. 9, 1904. M. 0. JOHNSON.

METAL WORKING MACHINE.

APPLICATION FILED 11mm, 1903. .xo 110mm. 1 12 BHEETS-SHBBT 11.

501231125 685 r :3 210 eznbr f y 'affirneyax PATENTED AUG. 9, 1904.

M. O. JOHNSON. METAL WORKING MACHINE.

APPLICATION FILED MAR. 7, 1903.

12 SHEETS-SHEET 12.

N0 MODEL.

MN A N i l ilzieazses;

Jnuezzar: $4. 6. (1011123051.

Patented August 9, 1904.

UNITED STATES PATENT .OEEICE.

MOSES O. JOHNSON, OF HARTFORD, CONNECTICUT.

METAL-WOFRKING MACHINE.

SPECIFICATION forming part of Letters Patent No. 766,828, dated August 9 1904;

Application filed March 7', 1903. 8eria1No.146,654. (No model.)

To all whom it nuty concern:

Be it known that LMosns C. JOHNSON, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Oonnecticut, have invented certain new and useful Improvements in Metalorking Machines, of which the following .is a specification.

My invention relates to metal-working machines, and is shown applied to one of that class of such machines employed for performing a series of operations upon stock held in the chuck of a live spindle, although in many of the details it is not limited to the use specified.

Primarilymy invention has for its object the provision of a table of peculiar construction for the reception of various blocks or supports carrying the tools for operating upon the stock.

A further object of the invention is the provision of improved means for indexing or intermittinglyrotating the table and for looking and releasing the same.-

A further object of the invention is the provision of improved means for securing the table against tipping movement or deflection from its true position on its carrier when strain is brought upon it by a tool in engagement with the work.

A further object of the invention is the provision of improved stop mechanism for lim-.

iting the movement of the carrier to which the intermittingly-rotating table is secured.

A further object of the invention is the provision, in connection with the table, of an index-ring kept in proper position byan externally threaded circular projection of the carriage.

Other objects of the invention will be hereinaiter mentioned.

In the accompanyingdrawings, Figure lis a side elevation of a metal-working machine involving the features of my invention. Fig. 2 is a plan view with part 01'' the bed and the head-stock removed. Fig. 3 is a transverse section on'line3 3 of Fig. 2. Fig. tis a horizontal section on the line i 4 of Fig. 3. Fig. 5 is a detail in perspective of a lever for actuating the locking-bolt. Fig. 6 is a plan view of the carriage with the table removed,

showing the top of the index-ring and also the top of the ring for securing said indexring in position. Fig. 7 is a transverse section on line 7 7 of Fig. 2. Fig. 8 is a longi tudinal vertical section of the stop-carrier, taken on line 8 8 of Fig. 7. Fig. 9 is a transverse section of said stop -carrier, taken on line 9 9 of Fig. 8. Fig. 10 is a plan view oi the adjustable pawl-carrier, part of the pawl being shown in section to disclose the springactuated pin or plunger mounted in a bore thereof. Fig. 11 is a side elevation of said pawl-carrier, and Fig. 12 is a front end view thereof. Figs. 13 and 141 are plan views of the front end of the pawl-carrier, showing, respectively, different positions of the pivoted lever for actuating the locking-bolt and of the cam and spring-actuated plunger cooperating with said lever. Fig. 15 is a plan view of a taper gib employed with the carriage. Fig. 16 is a transverse section on line 16 16 of Fig. 1. Figs. 17 and 18 are sectional views of like portions of the intcrmittingly-rotating tablegshowing the concave or are seats and different ways of securing the convex bases of the tool-supports in said seats. Fig. 19 is a plan view, and Fig. 20 an end view, 01" the carriage with'the parts supported thereby removed. Fig. 21 is a side elevation similar to Fig. 1 and illustrating two tool-holdcrs carrying tools for simultaneously operating upon difli'erent parts of the work. Fig. 22 is a plan View of a modified form of table. Fig. 23 is a section on line 23 23 of Fig. 22, showing the index-ring located in its preferred posi tion; and Fig. 2 1 is a section through a portion of the table and carriage.

Like characters designate similar parts throughout the several views.

Reierringto the drawings, the numeral 1 represents a bed of any suitable kind, shown mounted on legs 2, although it may be supported in any other way. Upon this bed is a head-stock 3, in bearings 4 of which is journaled a spindle 5, driven by a belt upon a stepped pulley 6 in the usual manner, said spindle carrying a chuck-head 7, in which stock of any desired kind may be secured.

Designated in a general way by the numeral 8 isa carriage, shown as a slide, having lateralflanges 9, depending flanges 10, a circular externally-threaded ring 12, projecting from its top and either integral therewith or secured thereto, as desired, a central recess 13, and a rectangular tongue 14, extending longitudinally of said carriage and depending from its under surface, said tongue having a perforation 15, a longitudinal perforation 16, and a rabbet or recess 17 in its side, as shown in Figs. 16, 19, and 20, all for purposes hereinafter described. This tongue extends centrally of the carriage, and it is fitted in a rectangular slot 18, formed in the top of the bed 1 and extending from end to end thereof.

Within a bearing 19, inserted in a tubular boss 20 of the carriage 8, is mounted a shaft 21, having a hand-wheel 22 and carrying a pinion 23, the latter being in engagement with a rack 24 of the lathe-bed l and serving as a means for reciprocating said carriage upon the bed. This means for moving the carriage is one of many that could be employed for accomplishing the result, for the carriage may be reciprocated by hand or automatically by any desired mechanism without departure from the invention.

Carried by the cable 8 and constituting a part thereof is an index-ring 25, provided with an inwardly-projecting flange 25', said ring havinga, series of locking-notches 26 and a base 25 resting upon the top of carriage 8. In the forms shown the index-ring is of L-shape in cross-section, and the inner edge of its base fits againsta circumferential shoulder or abutment 8 of the carriage 8, as shown in Figs. 3 and 16, and said ring may either be integral with or detachably connected to the table, as desired.

For securing the carriage upon the bed 1 the usual gibs 27 may be employed, said gibs fitting under the overhang of the bed and being attached to the flanges 10 by bolts 28; but other means may be utilized for this purpose, if desired.

Threaded upon the circular projection 12 of the carriage is an internally-tln'eaded annulus 29, which bears upon the top of the projecting flange 25 of the index-ring and serves to keep said ring in position uponthe carriage, the circular shoulder or abutment 8 forming a bearing around which said index-ring is fitted and is thus kept in its proper central lo.- cation. For locking this annulus against movement after it has been adjusted a plun:

ger a and a spiral spring 5 are seated in a recess 0 of the carriage 8. This plunger has a rounded tip a and is adapted to snap into any one of a series of holes (Z in the annulus, and thereby lock the same against displacement after it has beenadjusted. Threads of any desired proportions may be formed on the inner circumference of the annulus and on the periphery of the circular projection 12, and, for instance, these threads may be of such pitch as to cause the annulus to move onethousandth of an inch when it is turned in either direction a distance equal to the space between two of the holes. In the table 30 a Vertical opening a is formed, and for releasing the annulus so that it may be adjusted a rod f is inserted in said hole 6 and serves to push the plunger a downward to the position represented by full lines in 4 Fig. 24, after which by turning the table 30 the rod f will adjust the annulus until the plunger snaps into the next hole of the series, and thus locks the annulus in its adjusted position. In this way a micrometric adjustment may be made, one that will cause the annulus to hold the ring 25 in place against vertical or tilting movement with suflicient clearance to enable said ring to be moved freely for indexing purposes. Other means may be provided for adjusting the annulus, the invention not being limited in this respect.

For reasons hereinafter stated the indexring 25 and the circular projection 12 are so located .that a line drawn vertically through their common axis will intersect the longitudinal axis of the live spindle 5. In other words, said ring and said projection are concentrically disposed, and therefore have a common axis, so that a line-for instance, the line w m in Fig. 16drawn vertically through the center of the index-ring will pass through the longitudinal center of the live spindle and through the longitudinal, axis of Work supported by said spindle.

Any desired tool-carrying table may be mounted upon the index-ring, and several forms of such a table are herein shown and described. Coming now to the preferred form of said table, it is designated by 30 and consists of a circular plate or disk having a central perforation 31, which when the table is secured in position upon the index-ring 25 by screws 32 or otherwise is in line with the transverse opening 15 of the carriage 8. Here it may be stated that the table may also be fitted upon a cylindrical stud or plug 31', (see dotted lines, Fig. 23,) seated in the opening 15 of the carriage and projecting into the opening 31; but this opening is intended more particularly as a means for receiving an arbor for supporting the table when the tool-block seats or concave recesses are formed therein and below the top thereof, as will be hereinafter explained.

Radiating from the center of the table 30 are concave seats or recesses 33, each occupying an equal proportion of the surface of said table and each being located below the topv thereof. Between every pair of seats the material of the table is left of full depth, thereby producing ribs or lands 34, the arcs of the seats merging in said lands and the latter being enlarged at their outer ends at 34 to form. bearings for the screws 32, which secure the table to the index-ring, as shown in Figs..1, 2, 3, and 16. Each arc-seat is of the same curvature, and the seats may be formed in a table by mounting said table upon the carriage in the manner above described, then attaching a suitable boring or other tool to the line spindle 5, and then rotating the spindle and simultaneously advancing the carriage 8 and the table longitudinally beneath the tool, and after one seat has thus been made the table could be indexed and another seat formed, and so on until the set of seats is completed, each seat of which set would be of the same are shape and-of the same radial length, and all would be formed on a curve concentric to theaxisof the rota-tinglathe-spindle. This is but one of several ways in which the arcseats could be formed, and it is immaterial how they are made, provided that each will bear the relation described to the axis of the lathe-spindle when the tableis indexed to bring a pair of its seats into line therewith. Depending from the table are studs or pins 35, and secured byabolt 36 in a groove 37 of the bed 1 is a bar 88, having a slot 38', through which the bolt passes, said bar being first ad justed to position and then firmly clamped in place by the bolt. This bar is shown detached in Figs. 10 and 11, and it is provided with an enlarged portion 382, having a seat in which is pivoted a pawl or dog 39, having a fork 89 at its free end for engaging the studs or pins as the carriage moves away from the spindle to thereby partially rotate the table to bring a tool carried by one of the blocks in the arcuate seats of said table into position for operation. upon the stock. This pawl is recessed at 39 to receive a spring 40 and a pin 41, bearing against the spring, which pin rests against the enlarged part or head 38 of the slide and holds the pawl in a position to engage the pins 35 to rotatethe table when it moves away from the spindle, as above stated. Secured to the pawl is a pin 39, fitted in-a slot 38 the end walls of which limit the movement of said pin and pawl.

Pivoted in a seat-of the bar 38 is an arm 42, carrying a cam 43, the pivoted end of this arm being recessed to receive a pin 44, nor

mally forced outwardto bear against anabutment of the bar 38 by a spring 46, and the camhaving a pin 48, which is movable in a short transverse slot 47 in the forward end of said bar, said pin 44 thus serving normally to throw the arm 42 and its cam 43 to the position shown in Fig. 10 for a purpose hereinafter described. To enable the arm of the pawl to clear the pin 35 just back of the one in engagement with the fork or notch39 of said pawl, the latter is cut away or recessed at 48, as shown in Figs. 4, 10, and 11.

Mounted in a groove 49 of the carriage 8 is a locking-bolt 49, having its end. inclined at 49 to enable it more readily to enter the flaring locking-notches 26 of the index-ring 25. To advance and withdraw said locking-bolt, a bell-crank lever 50 is employed, said lever having a hub 50 mounted upon a stud 51 of the carnage 8.

One arm, 50, of this bellcrank is provided with an enlarged rounded head 50 iittedin a perforation 49 of the locking-bolt, while the other arm, 50*, carries a stud 52 and an antifriction-roller 53, located in aslot 50 of said arm. Fitted in a transverse recess of the carriage 8 are a tubular alun er 54 and a SJI'iD 55 enterin said plunger, and the tension of which may be regulated by a screw-cap 56, threaded into the walls of the recess, as shown in Fig. 4.

Located in the groove 49- of the carriage 8 parallel to the locking-bolt 49 is a gib 57, having a straight side fitting against said bolt and a tapering side in engagement with an inclined wall 4910f the groove. This gib is reduced at its front end, which dips below the index-ring 25, and is adapted to engage an adjustable screw or stud 58, the latter servinglto limit its inward movement, (see Fig. 4,)

and it is held with the desired amount of friction'against the side of the locking-bolt by a bell crank lever 59, the hub of which is mounted on a stud. 60, projecting from the carriage. One arm, 59, of the bell-crank is received in a seat of the gib, while the other arm, 59, bears against a plunger 61, mounted in a perforation of the carriage 8, the stem of said plunger being surrounded by a spring 62, the tension of which may be regulated by a tubular screw 63. As will be seen, this gib is constantly impelled forward by the bell-crank 59, urged to its work by spring-actuated plunger (51, and it therefore bears with s'uflicient pressure against the locking-bolt to sult is accomplished by the bell-crank lever 50, connected to said bolt, and the cam 43, carried by the pivoted lever-arm 42. indexingis accomplished on the movement of the carriage away from the spindle, and on theinception of-this movement the pin 52 of the levertravels up the inclined face 43 of the cam, which in position to receive said pin, as shownin Figs. 10 and 14. As the pin 52 travels up the incline 43 of the camthe lever 50 is rocked from the position represented in Fig. 13 to that shown in Fig. 14, and thus withdraws the locking-bolt from the notch 26 in the index-ring 25. Spring-actuated plunger 54 travels, as above stated, wlth the carriage and constantly bears against the roller 53 bell-crank lever; and consequently forces the I pin 52 against the cam. This cam is provided This i do

with a straight surface 43* and with an inclined side 43", and after the lever has been rocked to withdraw the locking-bolt by the inclined nose 43 of the cam the pin 52 travels along the straight portion 43 and locks the lever, and therefore the locking-bolt, in its withdrawn position until the table has been completely indexed by the pawl 39 in engagement with one of its pins 35. At the completion of the rearward movement of the carriage the pin 52 drops off the rear end of the cam, and the plunger 54, which was forced inward against the stress of its spring 55 when said pin was drawn up the incline 43 will immediately force the lever to the position represented in Fig. 4 and shoot the locking-bolt into the recess 26 of the index-ring, which is opposite thereto. To insure the proper location of the wedge-shaped end of the cam, so that the pin 52 will readily engage therewith, the horizontal lever-arm 42, which is pivoted on a vertical axis, is forced to the position represented in Fig. 10 by the spring-actuated plunger 44, which bears against the abutment 45 of the bar 38. In this way the locking-bolt is first withdrawn, then locked in its withdrawn position, and finally shot into place and locked against movement by the plunger 54 and bellcrank lever 50.

- To take up wear and lost motion of the carriage 8 as it reciprocates on the bed, a taper gib or key 64 is fitted in the longitudinal recess 17 of said carriage and bears on one of its sides against the inner wall of the slot in the bed 1, in which the rectangular tongue 14 travels, and on its opposite side against the tongue, as shown in Figs. 3, 7, and 16, and for adjusting this gib a screw 65, threaded into the carriage and mounted in any desired way upon the gib, may be employed.

Projecting from bar 38 is an arm 66, carrying a stud 67, upon which is sleeved an antifriction-roll 68.

Designated by 69 is a cylinder having a spiral cam-groove 7 0 for the reception of the roll 68, and this cylinder is loosely mounted upon the outer end 71 of a stop-carrying turret 71, located for intermittent rotation in that part of the central longitudinal bore 16 which extends through the outer end of the carriage 8, as shown more particularly in Figs. 3 and 8. V This turret is provided with a circumferential collar 72, either formed integral therewith, as shown, or detachable therefrom, and the cam-cylinder 69 is held. loosely against said collar by a plate 73, the latter being secured in position by a screw 74, threaded into the end of the turret. At its inner end the turret is threaded at 71 to receive a nut 75, which when turned against the wall. of the turret-bearing in the carriage will force the collar tightly against the end of said carriage, as shown in Fig. 8, thereby securing it in position. A jam-nut 76 is also threaded upon the end of the turret and locks the nut against rotation. I

In the periphery of the part 71' of the stopturret are ratchet-teeth 77, spaced at regular distances from each other, and mounted in a recess 78 of the cam-cylinder is a pivoted pawl 79, held in contact with the periphery of said cam-cylinder by a spring 80, as shown in Fig. 9. Longitudinally the turret is provided with a series of perforations 81 equal in number to the number of the ratchet-teeth 77, and in these perforations are adjustably fitted stop-rods 82, which pass through a se ries of holes 73 in the plate 73, said holes being in alinement with the perforations 81. In the periphery of collar 72 are notches 83, with which a spring stop-pawl 84 engages to lock the turret after each intermittent rotation thereof, said pawl being secured to the carriage, as shown in Fig. 7. In the periphery of this collar is also formed aseries of thread ed bores 85 for the reception of bolts 86, adapted to bear against the stop-rods and secure them in position after adjustment, the heads of said bolts being received in countersinks 87 of the collar, so that they will be below the surface thereof.

From the above description it will be seen that when the carriage moves away from the spindle roll 68 will turn the sleeve 69 and through the pawland-ratchet connections described index the stop-turret' and that when it moves toward said spindle the sleeve 69 will rotate idly on the part 71 of said turret and the pawl 79 will slip around the ratcheted periphery of the part mentioned without actuating the turret. A stop 88 is shown in dotted lines in Fig. l, and it serves to engage each stop-rod of the turret as said stop-rod is brought into position, and thus to limit the forward movement of the carriage. These stop-rods are located in the longitudinal bore 16 of the carriage, and they correspond in number to the number of arc-seats in the table. They are or may be so adjusted in the turret that their forward ends project different distances from the inner end of said turret and are therefore so disposed that the carriage will be stopped at the proper points in its advancing movements, so that the actions of thevarious tools upon the stock may be properly controlled.

In the arc-seats 33'of the table 30 tool-supports 89, shown as having lateral projections 90, with convex under surfaces 90, are mounted, and these supports may be secured in said arc-seats by various means. In Fig. 17 the lateral projection is provided with protuberances 91, having inclined tops against which the under surfaces of the heads of screw-bolts 92 bear, said bolts being tapped into the table, while in Fig. 18 the projection is slotted at 93 to receive a bolt 94, in virtue of which construction the tool-support may be adjusted in the arc of a circle concentric to the axis of the chuck-spindle 5. A great advantage of this form of tool-support resides in the fact that the convex projections come to an exact central position, the vertical axis of which is always in line with the longitudinal axis of the live spindle, whereby the tool is held in proper concentric relation to the work, no means of adjustment or special appliances being required for accomplishing this result. In other words, the tool-support when placed in its arcshaped'seat automatically centers itself with relation to the axis of said spindle andthe work held in the chuck 7 thereof.

My invention is not restricted to any particular form of tools support nor to any specific tool carried by said support, for different tool-supports with convex bases may be substituted for those shown without departure therefrom.

As will be seen from Fig. 21, when the table 30 is indexed to bring one toolsupport into line with the axis of the spindle the one directly opposite thereto on the other side of said table is also brought into position, the result being that two different tools-for instance, the metal turning-tools and 96- may be at work simultaneously upon the stock. Other kinds of tools may be employed for use upon the stock, those shown serving merely to illustrate one character of work that may be accomplished by the improved machine. 1

In the modification represented by Figs. 22 and 23 a carriage 97' of substantially the same form as that represented in Figs. 3 and.

16 is shown, and said carriage is provided.

with central and longitudinalperforations 15 and 16, like those of the carriage 8. Rising centrally from the carriage 97 is an integral, or it may be detachable, externally-threaded circular projection 98, andfitted upon this projection is an internally-threaded annulus 99, similar to the annulus 29, but of slightly-different shape therefrom. An index-ring 100, provided with flange 101, is secured in place upon the carriage 97 by said annulus, and this ring is indexed and locked in, position by means like those shown in Fig. 4c, the locking-bolt being designated by the numeral 49 and the end 50 of arm 50 of the bellcrank lever 50 for actuating the bolt being shown. Here it may be stated that the locking-bolt is reduced to form a tail or extension 19 so that it may be freely reciprocated beneath the lower ends of the pins 35. In said Figs. 22 and 23 a table 102 is shown secured to the index-ring by screws 103, and this table is recessed or cut out below its top to form guideways 104C for the reception of tongues 105 of slides 106, having guidegrooves 107 of a shape to receive the T-heads 108 of tool-posts 109, said slides being actuated by means of screws 110, working in nuts 112,

the stems of which are inserted in bores of the table. For securing these slides in place plates 113 are shown attached to the table byscrews llt, said plates fitting over rabbets of the slides, and for taking up wear or lost motion shims or gibs 115 may be employed. Any desired kind of tools may be fitted on these slides, and while toolposts for holding turning-tools are shown other tool-supports may be substituted, if de sired.

As above stated, the arrangement of the annulus and threaded projection illustrated in Fig. 23 is preferred, said parts. being removed from the periphery and located near the axis of the index-ring, and consequently that of the table. This forms a compact construction, enables an index ring or disk of greater rigidity to be employed, and is also less expensive to manufacture.

In the operation of my improved machine stock 116 is first securedin the chuck 7, the table is indexed by the mechanism described to bring the tool required into position for operation upon said stock, andthe turret71 is actuated to turn the one of its stop-rods re quired into line with the'stop 88, after which the carriage 8 is advanced by the mechanism shown until the stop-rod 82, in position for action, comes into contact with the. stop 88 and limits the further movement of the carriage. After one operation has thus been performed upon the stock the carriage is retracted, the table indexed to bring another tool into position, and said table then again locked in posi: tion, advanced to cause said second tool to act upon the work, and so on until the work is completed.

My improved table, with its arcrseats belo the top thereof, may be manufacturedand sold for use with various machines to the carriages thevarious parts may be made, and the arcseat table may be mounted on carriages different in form and different in mode of operation from the reciprocatory table shown. So, too,.the threaded projection and internally threaded annulus may be differently located, and various means may be substituted for that shown. for both adjusting and locking said annulus. i

Having thus described my invention, what I claim is i 1. A tool-holding table having 'a seat open at its top, and formed on an arc concentric to the axis of a work-spindle with which the table is to-be employed; i i

2. A tool-holding table having a series of seats, each seat being open at its top formed on an arc concentric to the axis of a work-holding spindle with which said table is to be employed.

3. The combination, withaspindle, ofacarriage; a table having a seat open at its top, and struck on an arc concentric with the axis of the spindle; and a tool supported in said arc-seat. 4. The combination, with a carriage, of a table having a series of arc-seats, each open at its top; tool-supports having convex bases fitted in said arc-seats; a carriage on which said table is mounted; means for reciprocating the carriage; and means for intermittingly rotating the table.

5. The combination, with a live-spindle, of a carriage; a table having arc-seats, each open at the top; tool-supports having convex bottoms secured in said arc-seats; means for reciprocating the carriage; an index-ring rigid with the table; means for intermittingly rotating the table; and means for engaging said index-ring to lock the same after the indexing operation.

6. The combination, with a carriage having a circumferential projection rigid therewith, of a tool-holding table; an index-ring rigid with the table; and an annulus in adjustable engagement with the circumferential projection of the carriage, and serving to hold said index-ring and table in place on said'carriage.

7. The combination, with a carriage, having a circumferential, externally-threaded projection rigid therewith, of a tool-holding table; an index-ring rigid with said table; and an internally-threaded annulus in engagement with said projection and fitting over a part of the index-ring.

8. The combination, with a carriage, having acircumferential, externally-threaded projection, of atool-supporting table; an index-ring detachably secured to said table, said ring having a circumferential flange; and an internally-threaded annulus in engagement with the threads of the projection and serving to secure the ring and table in place upon the carriage.

9. The combination, with a carriage having a circumferential projection, of a tool-supporting table; an index-ring rigid with said table; an annulus in adjustable engagement with the circumferential projection and fitting over a part of said index-ring; and means for locking the annulus. V

10. The combination, with a carriage, having a rigid, circumferential, threaded projection, of a tool-holding table; a threaded annulus in engagement with the threaded projection, and fitting over a part of the table; and means on the carriage for locking the annulus. 11. The combination, with a carriage, of a revoluble table; a threaded, circumferential projection carried by the carriage, and located at or near the axis of said table; and a threaded annulus in engagement with the circumferential pro ection, and fitting over a part of the table.

12. The combination, with a carriage, of a revoluble table, an externally-threaded circumferential projection rising from the table near the axis thereof; and an internallythreaded annulus in engagement with said projection, and fitting over a part of the table.

13. The combination, with a carriage, of a revoluble tool-supporting table mounted on said carriage; an index-ring rigid with the table, and having a flange; a threaded, circumferential projection rising from the table; and a threaded annulus in engagement with said projection, and fitting over the flange of said index-ring.

14. [n a machine of the class specified, the combination, with a carriage, of a revoluble tool-supporting table mounted on said carriage; an index-ring having a lateral extension rigid with the table; a threaded, circumferential projection rising from the carriage; a threaded annulus in engagement with said threaded projection and fitting over the lateral extension of the index-ring; and means for locking said annulus against rotation after it has been adjusted. V

15. The combination, with a carriage, having a circumferential, threaded projection, of

a revoluble tool-supporting table; a ring rigid with the table; a threaded annulus in engagement with the projection and.fitting over a part of the ring; and means for locking the annulus against displacement.

16. The combination, with a carriage having a threaded, annular projection, of a revoluble tool-holding table mounted on said carriage; a threaded annulus in engagement with the annular projection, and fitting overa part of the table; and a device on the carriage for locking said annulus.

17. The combination, with a carriage, of a revoluble tool-holding table mounted on said carriage; a threaded, circumferential projection on the carriage; a threaded annulus in engagement with said projection, said annulus having a series of perforations; and a springactuated plunger carried by the carriage and adapted to enter. said perforations and lock the annulus against movement after it has been adjusted.

18. The combination, with a carriage having a recess, of a revoluble table mounted-0n said carriage, and having a passage adapted to receive a tool; a circumferential projection on the carriage; an annulus in adjustable engagement with the projection, said annulus having perforations; and a spring-actuated plunger seated in the recess of the carriage, and adapted to enter said perforations in the annulus, and to be released therefrom by a tool inserted in said passage of the table.

IIO

19. In a machine o'f the class described, the combination, with a carriage having a circumferential; threaded projection, and also having a recess, of a threaded annulus having perforations, and in engagement with said projection; a spring-actuated plunger seated in the-recess of the carriage, and adapted to enopen-top arc-seat for the reception of a tool:

support, said arc-seat being formed on a curve concentric to the axis of the spindle.

21. In a machine of the class described, the combination, with alive-spindle, of a revoluble table having an. open-top tool-carrying arc-seat radiating from its axis, saidarc-seat being formed on a curve concentric with the axis of the spindle; a tool-support having a curved base formed on an arc of the same radius as that of said are-seat; and a carriage on which said table is mounted.

22. In a machine of the class described, the combination, with a carriage, of a live-spindle; a revoluble table having a series of opentop tool-carrying arc-seats radiating from its axis, each arc-seat being formed on a curve concentric with the axis of the spindle; a series of tools mounted in said arc-seats; means for indexing the table; and means for locking said. table subsequent to the indexing operation.

23. In a machine of the class described, the combination, with a carriage, of atablemounted thereon; a series of pins projecting from said table; a stationary bar carried by the frame; means whereby said bar may be adjusted and then secured in position, a dog pivoted to said bar, and adapted to engage the pins; a locking-bolt adapted to engage a part ofthe table; and -means for advancing and withdrawing said locking-bolt. 24. The combination, \vitha carriage, of a table supported for intermittent rotary movement thereon and having locking-notches; a pivoted pawl; devices on the table with which said pawl is adapted to engage when the carriage is retracted; a cam having limited movement; a locking-bolt; and means actuatedby the cam for retracting said locking-bolt.

25. The combination,with a machine-frame,

of a bar adjustable on said frame; means for rigidlysecuring said bar after adjustment; a pawl pivoted to the bar; a reciproeatory carriage; a revoluble table mounted on the cartraction of the carriage; an arm pivoted to the bar; a cam lIlOl'lllllBCl on the arm; a locking-bolt; a two-armed lever, one arm of which is in engagel'nent with said locking-bolt and the other of which is adapted to ride upon the cam and to throw the bolt in one direction; and means for actuating said lever to throw the bolt in an opposite direction.

26. The combination, with a carriage, of a table having locking-notches; means for intermittingly rotating said table; a locking bolt; means for actuating said locking-bolt; a taper gib in engagement with the locking bolt; a two-armcd lever, an arm of which is connectedto the locking-bolt; and a spring acting upon the other arm of said lever.

27. The combination, with a carriage having a groove, of a table; means for intermittingly rotating said table; a locl ing-bolt seated in the groove; means for advancing and Withdrawing said locking-bolt; a taper gib also seated in the groove of the table; a bellcrank, one arm of which is connected to the gib; a spring-actuated plunger bearing against the other arm of said bell-crank; and an ad justable .stop for limiting the movement of the gib.

28. The combination, with a carriage, oi a revoluble table mounted on said carriage; a stationary bar fitted in a groove of the car, riage; an indexing-pawl pivoted to said bar; devices on the carriage, and cooperating with said pawl in the indexing operation; an arm pivoted to said stationary bar; a cam having inclined and straight surfaces carried by said pivoted bar; apivotedtwo-armed lever, one armof which carries a stud adapted to engage the cam; a locking-bolt connected to the other arm of said lever; an index-ring rigid with the revoluble table, and having notches for the reception of the locking-bolt; and a spring-actuated plunger bearing againstthe arm of the lever in engagement with the cam, said plunger serving to actuate the lever and to cause it to shoot the locking-bolt.

29. The combination, with a carriage, of a revoluble table mounted on said carriage; an adjustable bar secured to the bed and fitted in a groove of the carriage; means for indexing the carriage; a yielding arm pivoted to the bar; a cam having inclincdand straight portions carried by the bar; a two-armed lever pivoted to the carriagc;a stud on one arm of said lever, said stud being adapted to engage the cam; a spring-actuated device on the carriage, and in contact with the arm carrying the stud; a locking-boltlitted in a groove of the carriage and connected to the other arm of said lever; and. an index-ring rigid with the table, and having notches to receive said bolt. i

30. The combination, with a bed, of a carriage; a tool-supportingtablemounted on said carriage; a bar secured to the bed andover which the carriage travels; means for in dexing the table; an arm pivoted to the bar,

and having a pin movable in a slot of said bar; a spring-actuated pin seated in a recess of the arm and bearing against an abutment of the bar; a cam having an inclined and a straight portion carried by the arm; a bellcrank pivoted to the carriage, one arm of said bell-crank carrying a pin adapted to engage the cam; a locking-bolt actuated by the other arm of the bell-crank; a spring-controlled device for causing said bell-crank to shoot the bolt; and an index-ring rigid with the revoluble table and having notches for the reception of said locking-bolt.

31. The combination, with a carriage, of a stop-carrying turret having a series of perforations; stop-rods adjustable in said perforations; a device sleeved upon the turret; means for oscillating said device; and means for connecting said device with, and disconnecting it from, the turret.

32. The combination, with a carriage, of a stop-carrying turret journaled for intermittent rotation therein; stop-rods adjustably connected to said turret; means for clamping said rods after adjustment; a cylinder sleeved on the turret; a pawl carried by said cylinder, and adapted to engage teeth on the turret; and means for turning said cylinder.

33. The combination, with a carriage, of a stop-carrying turret mounted thereon, and having longitudinal perforations; stops adjustable in said perforations; means for clamping said stops after adjustment; a sleeve having a cam-groove, said sleeve being loosely mounted on the turret; a pawl carried by the sleeve, and adapted to engage teeth on said turret to index the same; and a stationary stud fitted in the cam-groove.

34. The combination, with a carriage, of a stop-carrying turret mounted thereon, and consisting of a cylinder having longitudinal perforations, said cylinder being provided with a collar intermediate its ends and with ratchet-teeth; a cam-sleeve loose on one end of the cylinder; a pawl carried by the sleeve and adapted to engage the ratchet-teeth, when the sleeve is moved in one direction; stoprods adjustable in the perforations of the cylinder; screws threaded into the collar, and adapted to clamp the stop-rods in place after adjustment; a stud projecting from the frame, and serving to actuate the cam; means for reciprocating the carriage; and a stop carried by the frame, and serving to engage the stoprods and limit the movement of the carriage.

35. The combination, with a reciprocatory carriage, of a stop-carrying-turret cylinder having a series of longitudinal perforations; a table mounted on the carriage; means for indeXing the table; adjustable stop-rods mounted in the perforations; means for securing said rods in place after ad ustment; a sleeve having a cam-groove, said sleeve being loose on the cylinder; means for connecting said sleeve with the turretcylinder when the sleeve is actuated in one direction; and a stationary stud entering the cam-groove and serving to actuate the sleeve.

36. The combination, with a reciprocatory carriage, of a tool-supporting table mounted on said carriage; a bar adjustable in the frame; a pawl pivoted to said bar; a series of pins depending from the turret, and with which the pawl is adapted to engage; a bracket carrying a stud, said bracket being secured to the bar; a longitudinally-perforated stop-carrying turret mounted in the carriage; stop-rods adjustable in the perforations of said turret; means for securing said stop-rods after adjustment; a sleeve having a cam-groove, for the reception of the stud, said sleeve being loose on the turret; and a pawl carried by the sleeve, and adapted to engage teeth on the turret.

37 The combination, with a carriage,having an annular, threaded projection rising from its central portion, of a tool-supporting table having a flange; a threaded annulus engaging the projection and fitting over the flange; and a removable device actuated by the table for rotating said annulus.

38. The combination, with a movable car' riage having a bore, of a support; a stop-rod carried by the support and located in the bore; and a stop on the frame extending into the bore of said carriage, and adapted to engage the stop-rod.

39. The combination, with a movable carriage having a bore extending through it, of a revoluble turret; stop-rods carried by the turret and extending into the bore; and a stop carried by the frame and adapted to engage the stop-rods and thus limit the movement of the carriage.

2L0. The combination, with a reciprocatory carriage having a longitudinal bore, of a turret seated in a part of said bore, said turret having longitudinal perforations; stop-rods adjustable in said perforations; means for securing said stop-rods after adjustment; means for intermittingly rotating the turret; and means for engaging the stop-rods and thus limiting the movement of the carriage.

41. In a machine of the class described, the combination, with a carriage, said carriage having a central recess, and adjacent to said recess an externally-threaded,circumferential projection, of a revoluble, tool supporting table having a depending cylindrical portion seated in said recess; a ring rigid with the table; and an internally-threaded annulus in engagement with said threaded projection, and fitting over a part of said ring.

42. In a machine of the class described, the combination,with a carriage having a central depression and bordering said depression an externally-threaded projection, of a tool-carrying table having a cylindrical portion fitted in the depression; a ring secured to the table 

